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How is the motor torque measured by Altivar 71 / 61
The Motor Torque is not measured by the Drive. It is calculated from the measurement of Motor Current and the estimated Speed (or measured speed in close loop).
OTR % (Motor Torque) = (Iq / Iqn) * (PhirdRef / Phirn)

Where:
Iq = Current Torque provide by the command to drive motor.
Iqn = Nominal Current Torque computes with the motor name plate
PhirdRef = Flux provide by the command to drive motor
Phirn = Nominal flux of the motor

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